Anturane, sulfinpyrazone USP, is auricosuric agent available as 100-mg
tablets and 200-mg capsules for oral administration. Its chemical name
is 1,2-diphenyl-4-[2-(phenylsulfinyl)ethyl]-3,5-pyrazolidinedione.

Sulfinpyrazone USP is a white to off-white powder practically insoluble
in water and in solvent hexane, soluble in alcohol and in acetone, and
sparingly soluble in dilute alkali. Its molecular weight is 404.48.